network madness? >> well, it's when work is disrupted, not so much because people are distracted by the games, which happens regardless of how your network works, but when other people who aren't even interested in march madness have their jobs close down. they can't access their e-mail, they have trouble surfing the web. >> reporter: in other words, it's when you've got a bunch of people sitting at desks who aren't working and streaming the games that can cause the company's internet to come to a screeching halt. by the way, in tv news, we call this file video. they are not really watching games. >> i think each company needs to decide, but at cisco, what we do, is allow employees to do these things and are accountable for their productivity, but we allow them to access these kind of content. >> reporter: enjoy, cisco employees. and for everyone else, check with your i.t. manager or try not to get caught. dan simon, cnn, san jose, california. >> and, of course, march madness continues today.